Leal-Junior Arnaldo G, Díaz Camilo, Marques Carlos, Frizera Anselmo, Pontes Maria José
Mechanical Engineering Department, Federal University of Espírito Santo, Fernando Ferrari avenue, 29075-910, Vitória-ES, Brazil.
Graduate Program on Electrical Engineering, Federal University of Espírito Santo, Fernando Ferrari avenue, 29075-910, Vitória-ES, Brazil.
Sensors (Basel). 2019 Aug 11;19(16):3514. doi: 10.3390/s19163514.
We report the development of a fiber Bragg grating (FBG) sensor for multiparameter sensing using only one FBG. The FBG was half-embedded in a 3D-printed structure, which resulted in a division of the grating spectrum creating two peaks with different sensitivities with respect to different physical parameters. A numerical analysis of the proposed technique was performed using the coupled-mode theory with modified transfer matrix formulation. Then, experimental analyses were performed as function of temperature, strain and force, where the peaks showed different sensitivities in all analyzed cases. Such results enable the application of a technique for simultaneous measurement of multiple physical parameters using both peaks and the full width half maximum of the FBG embedded in a 3D structure. In the simultaneous multiparameter assessment, the proposed sensor system was able to estimate the three tested parameters (strain, temperature and force) with relative errors as low as 4%.
我们报告了一种仅使用一个光纤布拉格光栅（FBG）进行多参数传感的光纤布拉格光栅传感器的开发情况。该FBG半嵌入在3D打印结构中，这导致光栅光谱分裂，产生两个对不同物理参数具有不同灵敏度的峰值。使用具有修正传输矩阵公式的耦合模理论对所提出的技术进行了数值分析。然后，作为温度、应变和力的函数进行了实验分析，其中在所有分析情况下峰值都显示出不同的灵敏度。这些结果使得能够应用一种利用嵌入3D结构中的FBG的两个峰值和半高全宽来同时测量多个物理参数的技术。在同时进行的多参数评估中，所提出的传感器系统能够以低至4%的相对误差估计三个测试参数（应变、温度和力）。
